Fred Flintstone was right all along

[Bon Sauvage]

Bronto burgers are back on the menu boys!

http://www.scientificamerican.com/article/the-brontosaurus-is-back1/

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[trainsktg]

I have no idea how such giant animals and insects (2' wide dragonflies, 8' long centipedes etc) were possible. Oxygen content must have been alot higher in that early atmosphere. I do not see how any of them could survive in current conditions.

Keith

 

[Bon Sauvage]

It was a lot higher! So were the CO2 levels depending on the period.

 

[NoFlinch]

. Oxygen content must have been alot higher in that early atmosphere. I do not see how any of them could survive in current conditions.
Keith

Despite her high oxygen usage, Hillary seems to be surviving, so maybe it would be possible..........